Dayside magnetic reconnection at the magnetopause, which is a major driver of space weather, is studied for the first time in a three-dimensional (3D) realistic setup using a hybrid-Vlasov kinetic model. A noon–midnight meridional plane simulation is extended in the dawn–dusk direction to cover 7 Earth radii. The southward interplanetary magnetic field causes magnetic reconnection to occur at the subsolar magnetopause. Perturbations arising from kinetic instabilities in the magnetosheath appear to modulate the reconnection. Its characteristics are consistent with multiple, bursty, and patchy magnetopause reconnection. It is shown that the kinetic behavior of the plasma, as simulated by the model, has consequences on the applicability of methods such as the four-field junction to identify and analyze magnetic reconnection in 3D kinetic simulations.

中文翻译：

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三维日侧磁层顶重联的混合 Vlasov 建模

磁层顶的日侧磁重联是空间天气的主要驱动因素，首次在三维 (3D) 现实设置中使用混合 Vlasov 动力学模型进行研究。中午-午夜子午平面模拟在黎明-黄昏方向扩展到覆盖 7 个地球半径。向南的行星际磁场导致在太阳下磁层顶发生磁重联。磁鞘中动力学不稳定性引起的扰动似乎调节了重新连接。其特征与多次、突发、片状磁层顶重联相一致。结果表明，由模型模拟的等离子体的动力学行为对诸如四场结等方法在 3D 动力学模拟中识别和分析磁重联等方法的适用性有影响。